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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Statement of Other Comprehensive Income [Abstract]    
Net income $ 126,995 $ 270,771
Employee benefit plans:    
Amortization of and adjustments to employee benefit costs 964 (627)
Income tax (expense) benefit (214) 139
Total other comprehensive income (loss), net of tax 750 (488)
Total comprehensive income $ 127,745 $ 270,283